Drinking water quality · 2024
· Verified
What's in Joliet, IL tap water
16 contaminants were measured in the Joliet, IL water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 16
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- IL
Where your water comes from · EPA SDWIS
Joliet, IL's drinking water comes from ground water, drawn from 26 sources.
Source
- WELL 5D
- WELL 6D
- WELL 7D
- WELL 8D
- + 22 more
Treatment
- TP09-HMO WELLS 11D,23D
- TP10-HMO WELL 12D
- TP11-HMO WELL 15D
- + 8 more
Distribution
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based39 violations on record · most recent Oct 2007resolved
- Treatment technique violationHealth-based3 violations on record · most recent Oct 2024resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 3.92 pCi/LReported levelSystem-wide | 0 pCi/LMCLG | Within the limit |
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 10.2 pCi/LReported levelSystem-wide | 0 pCi/LMCLG | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.06684 ug/LReported levelSystem-wide | 0 ug/LMCLG | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.901 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.00777 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.96 ug/LReported levelSystem-wide | 0 ug/LMCLG | Within the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 2.79 ug/LReported levelSystem-wide | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.023 mg/LReported levelSystem-wide | 2 mg/LMCLG | Within the limit |
| ManganeseA naturally occurring metal from soil and rock. | 200 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 119000 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
| ZincA naturally occurring metal that can also enter water from corroding pipes. | 0.00934 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 2.2 mg/LMaximumSystem-wide | 4 mg/LMRDLG | Within the limit |
Inorganic chemicals
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Benzo(a)pyrene | 20 ng/LMaximumSystem-wide | 0 ng/LMRDLG | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 4.24 ug/LReported levelSystem-wide | None set | Within the limit |
People also ask about Joliet, IL's water
+Is Joliet, IL tap water safe to drink in 2024?
Every one of the 16 contaminants measured in Joliet, IL's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Joliet, IL tap water?
16 contaminants were measured in Joliet, IL's 2024 Consumer Confidence Report, spanning metals, radionuclides, and inorganic chemicals. 10 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Joliet, IL's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Joliet, IL's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.